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Pneumatic and Semipneumatic Plugs for Large-Diameter Rumen Fistulas in Cattle¹

Department of Animal Husbandry, University of California, Davis

ABSTRACT

Detailed fabrication procedures for large-diameter pneumatic and semipneumatic fistula-plugs are described. They were found, over an 18-mo. period, to be exceptionally durable, moderate in cost, and could be removed and replaced with little discomfort to the animal. They did not irritate the fistula, and required a minimum of attention (no fistula-plug care was required by four fistulated animals during a 4-mo. period).

A fistulation technique which produces a uniform fistula particularly suited to the plugs also is described. The fistulas thus produced, in the presence of the rubber plugs, showed little or no swelling immediately postoperative or during healing, and retained their size and shape satisfactorily during an 18-mo. period. No deaths from fistulation occurred.

¹ In cooperation with the Animal Disease and Parasite Research Division, Agricultural Research Service, USDA.

² Present address: Department of Animal Science, University of Alberta, Edmonton, Alberta, Canada.